A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably ____.

In chickens, rose comb (R) is dominant to single comb (r). A homozygous rose-combed rooster is mated with a single-combed hen. All of the chicks in the F₁ generation were kept together as a group for several years. They were allowed to mate only within their own group. What is the expected phenotype of the F₂ chicks?

In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue?

Which event during meiosis leads to a reduction in chromosome number from 2n to n?

Crossing over would most likely occur during which stage of the cell cycle?

Which is the best description of the events that take place during anaphase II?

What is the role of the spindle fibers?

The typical human body cell contains 46 chromosomes. How many chromosomes are found in a typical human sperm?

Suppose an animal is heterozygous AaBb, and the traits are not linked. When meiosis occurs, what is the total number of possible combinations of gametes that can be made for these traits?

Suppose an animal is heterozygous AaBbCc, and the traits are not linked. When meiosis occurs, what is the total number of possible combinations of gametes that can be made for these traits?

During which phase of meiosis do homologous pairs of chromosomes line up next to one another along the equator?

Which stage of meiosis is responsible for the law of independent assortment?

A true-breeding tall pea plant is crossed with a true-breeding short pea plant, and all the offspring are tall. What is the most likely genotype of the offspring assuming a single-gene trait?

In mice, black is dominant to white color and color is determined by a single gene. Two black mice are crossed. They produce 2 black offspring and one white offspring. If the white offspring is crossed with one of its parents, what percent of the offspring are expected to be white?

A heterozygous organism is best described as which of these?

If two heterozygous individuals are crossed, what percent of their offspring are also expected to be heterozygous?

Of the following species used in agriculture, which is most likely a polyploid?

Which of the following would be least likely to happen as a result of a mutation in a person's skin cells?

Which series is arranged in order from largest to smallest in size?

A DNA segment is changed from-AATTAG- to -AAATAG-. This is a ____.

A DNA segment is changed from -AATTAGAAATAG- to -ATTAGAAATAG-.  This is a ____.

Where would a DNA substitution probably have the smallest or least effect on the organism?

A particular sequence of parent DNA has four purine bases and two pyrimidine bases.  According to base-pairing rules, which of the following sequences could be formed during replication?

Which of the following sequences of processes correctly reflects the central dogma?

Here are two related mRNA sequences: 5'UUUAGCGAGCAU3' and 5'UUUAGCCAUAAAAAAAA3'.  How was the second sequence formed?

Using DNA sequencing, you discover that a bacterium has experienced a deletion mutation that removed three nucleotides.  The bacterium appears completely unaffected in all its functions.  Where is the mostly likely location for the mutation?

Within a decade of the introduction of a new insecticide, nearly all of the descendants of the target insects are resistant to the usual-sized dose. What is the most likely explanation for this change in susceptibility to the insecticide?

Which answer best shows an animal's adaptation to the tropical rain forest?

Which combination of characteristics in a population would provide the greatest potential for evolutionary change?

Which of the following is a correct statement about the relationship between natural selection and evolution?

How do fossils demonstrate evidence of evolution?

Which of the following is an accurate comparison of derived traits and ancestral traits?

Which of the following is the explanation of why bird wings and reptile forelegs are evidence of evolution?

Superficially similar features molded by natural selection in very different species are classified as what kind of structures?

According to Darwin, which of the following best explains why the mara is more similar to other South American mammals than it is to the rabbit?

Some features in organisms can be compared to spandrels in architecture in that, although they appear to have a function, they are really just there because of the evolution of other structures.  This analogy is used as an argument for care in identifying what?

When allelic frequencies remain unchanged, a population is in genetic equilibrium. This statement expresses which of the following?

A population diverges and becomes reproductively isolated. Which of the following is the best description of that phenomenon?

What is the term describing the process that occurs when a species evolves into a new species without a physical barrier separating populations?

If a species is suddenly introduced into a new habitat, what might occur?

Which of the following is biochemical evidence for evolution?

On the islands of Hawaii there are a group of about 30 species of highly variable, but closely related, species of plant called silverswords. These species appear to be related to a small group of plants in North America. What are the silverswords an example of?

Which of the following is the correct way to write the scientific name of the Northern cardinal?

Which of the following is a taxon of related phyla or divisions?

Which of the following is the most general taxon?

Which of the following lists the taxa from broadest to most specific?

To which domain does the American black bear belong?

Which of the following is an example of a morphological character used for classification of taxa?

Which type of character is found within an entire line of descent of a group of organisms?

Which of the following Kingdoms is not included in the Domain Eukarya?